Black Sponge? REEF2REEF Saltwater and Reef Aquarium Forum

Is this a sponge of some sort? I haven't added anything to my tank in months.

Encrusting black sponge REEF2REEF Saltwater and Reef Aquarium Forum

Film with Black dots REEF2REEF Saltwater and Reef Aquarium Forum

Black nudibranch? REEF2REEF Saltwater and Reef Aquarium Forum

Large black stomatella? REEF2REEF Saltwater and Reef Aquarium Forum

What is this black hitchhikera sponge? REEF2REEF Saltwater and Reef Aquarium Forum

Brown nuisance sponge Identification REEF2REEF Saltwater and Reef Aquarium Forum

Encrusting sponge REEF2REEF Saltwater and Reef Aquarium Forum

sponges. Too many? What eats them? REEF2REEF Saltwater and Reef Aquarium Forum

Furred sponge crab? REEF2REEF Saltwater and Reef Aquarium Forum

Sponge ID? REEF2REEF Saltwater and Reef Aquarium Forum